Key takeaways
Erythromycin (Ilotycin) and Ciprofloxacin (Ciloxan) are both antibiotics used to treat bacterial eye infections, but they belong to different classes and have distinct uses and application methods. Erythromycin is a macrolide antibiotic available only as an ointment, typically applied up to six times a day, and is also used to prevent pink eye in newborns. In contrast, Ciprofloxacin is a fluoroquinolone antibiotic available in both ointment and solution forms. The ointment is applied three times a day initially, then twice a day, while the solution requires more frequent dosing, especially for corneal ulcers. Ciprofloxacin can treat both pink eye and corneal ulcers, whereas erythromycin is mainly for bacterial eye infections and pink eye prevention in newborns. Both medications are generally well-tolerated but can cause temporary eye irritation and blurry vision. Ciprofloxacin is available as a generic solution, making it more affordable, while erythromycin is only available as a generic ointment. Neither medication should be used with contact lenses during treatment.
